zhpsЖурнал прикладной спектроскопииZhurnal Prikladnoii Spektroskopii0514-7506B. I. Stepanov Institute of Physics of the National Academy of Scienceszhps-572Research ArticleСтатьиМЕХАНИЗМ АННИГИЛЯЦИОННОЙ ЗАМЕДЛЕННОЙ ФЛУОРЕСЦЕНЦИИ РАСТВОРА 7-АЗАИНДОЛА В ЦИКЛОГЕКСАНЕMECHANISM OF THE ANNIHILATION DELAYED FLUORESCENCE OF 7-AZAINDOLE SOLUTION IN CYCLOHEXANEСуходолаА. А.SukhodolaA. A.

220072, Минск, просп. Независимости, 68-2

68-2 Nezavisimosti Prosp., Minsk, 220072

sukhodola@imaph.bas-net.byИнститут физики НАН БеларусиB. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus201920032020863360367Copyright © Суходола А.А., 20202020Суходола А.А.Sukhodola A.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://zhps.ejournal.by/jour/article/view/572

The spectral-kinetic characteristics of the annihilation delayed fluorescence (ADF) of 7-azaindole solution in cyclohexane were measured at room temperature. Two bands with maxima at 345 and 480 nm were observed in the ADF spectrum. The short-wavelength band is interpreted as ADF of dimers formed due to dipole-dipole interactions of molecules in excited singlet and ground states, which are populated as a result of triplet-triplet annihilation of monomers. The long-wavelength band refers to the ADF of dimertautomers, which are formed due to the double hydrogen bond and double proton transfer. Excited singlet states of dimers-tautomers are populated as a result of the mixed annihilation of the triplet states of monomers and dimers-tautomers. The decay kinetics of triplet states of monomers and dimers-tautomers is determined mainly by triplet-triplet annihilation processes.

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The authors declare that there are no conflicts of interest present.